Chain-grate furnace.



'PatehtecLM-ar. 26, 1901'. .r. R. TIBBITTS.

CHAIN GRATE FURNACE.

(Application fll'ed Oct. 8, 1900.) (No Model.)

I Sheets-Shoat l.

No. 670,694. I

r. R. TIBBITTS. CHAIN GRATE FURNACE.

Patented Mar. 26, mm.

(Application filed Oct. 8, 1900.;

2 Sheets-Shut 2.

(No M01181.)

Witnesses; /0 i d.

ing the motor.

UNITED STATES PATENT OFFICE."

FRANK R. TIBBITTS, OF ERIE, PENNSYLVANIA.

CHAIN-G RATE FURNACE.

SPECIFICATION forming part of Letters Patent No. 670,694, dated March 26, 1901.

Application filed October 8, 1900. Serial No. 32,459. (No model.)

To (1. whom, it may concern:

Be it known that I, FRANK R. TIBBITTS, a citizen of the United States of America, and a resident of the city of Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Chain-Grate Furnaces, of which the following is a specification.

This invention relates to endless-chaingrate furnaces; and it consists in the new construction and combination of the motive power for operating the working parts of the chain grate,whereby the chain grate is strictly automatic and independent in its operations, substantially as hereinafter described, and pointed out in the claim.

The particular feature of this improvement is the mounting of the motor on the side-frame extension-plates, resulting in greatly simplifying the structure and reducing the number of parts and rendering the machine more compact in form and arrangement.

In the accompanying drawings, Figure 1 is a perspective view of the complete and perfected chain grate, showing the newly-acquired motive mechanism. Fig. 2 is a side elevation of a side extension-plate, showing a bracket cast integral therewith for support- Fig. 3 is a front edge elevation of the same. Fig. 4 is a vertical section on line a 4 on Fig. 2.

A, Fig. 1, represents the carriage which supports and carries all of the working mechanisms of the furnace-grate.

B B are side extension-plates attached to the side frames of the carriage.

O is the endless-chain traveling grate.

D is a shaft provided with sprocket-wheels which carry the chain grate. E E are adjustable bearing-blocks for said shaft,held in spaces F F in said extension-plates. G G are screws playing in the nuts N N and bearing against the said blocks E E, designed for moving up said bearing-blocks for stretching out the chains in case they should become slack.

H is a worm gear-Wheel attached to the forward sprocket-shaft, and I is the worm on shaft J, supported in the bracket-bearings K K, fixed onto the side of the extension-plate.

L is a ratchet-wheel supported on the end of said worm-shaft. H is a triangular frame also mounted on said worm-shaft, provided with a pawl m in its upper angle and engaging with said ratchet.

P is a bracket for supporting the motor, cast integral with the side plate B, and O is the motor, consisting of a small cylinder-engine secured to said bracket, having its pitman playing vertically and connected with the outer angle of the frame M, by means of which motion is imparted to the worm-gear for propelling the chain grate.

R is a pipe for connecting the engine with the boiler for conveying steam to operate the engine, and S is the exhaust-pipe for exhaust ing into a waste or other pipe.

The motor may be attached to either of the a side plates, as the case may require. Sometimes it may be necessary to place this mechanism at the opposite side of the carriage, in

ings on the extension-plate, a ratchet-wheel mounted on said worm-shaft, a frame and pawl also mounted on said worm-shaft; of the bracket on the extension-plate and a motor supported on said bracket and having its pitman connected to the pawl-frame, adapted to operate the chain grate, substantially as described.

Signed by me at Erie, Pennsylvania, this 2d day of October, 1900.

FRANK. R. TIBBITTS. Witnesses:

WM. HAOKENBERGER, G. H. WILLIAMS. 

